Pracuj.pl - czarna lista firm

// ==UserScript==
// @name         Pracuj.pl - czarna lista firm
// @namespace    macgajster
// @version      1.5
// @match        https://www.pracuj.pl/*
// @match        https://www.it.pracuj.pl/*
// @run-at       document-idle
// @grant        none
// ==/UserScript==

(function () {
    'use strict';

    const blacklist = [
        'firma A',
        'firma B',
        'firma C'
    ];

    const offerSelector = '#offers-list [data-test-offerid]';
    const processedOffers = new WeakSet();
    const seenOffers = new Set();
    const hiddenOffers = new Set();

    const normalize = value =>
        (value || '')
            .toLocaleLowerCase('pl')
            .replace(/\s+/g, ' ')
            .trim();

    function getCompanyNames(offer) {
        return Array.from(
            offer.querySelectorAll('[data-test="link-company-profile"]')
        )
            .map(link =>
                link.textContent ||
                link.getAttribute('title') ||
                ''
            )
            .map(name => name.trim())
            .filter(Boolean);
    }

    function createWarning(company) {
        const warning = document.createElement('div');

        warning.dataset.blacklistWarning = '1';
        warning.style.cssText = [
            'background:#fff3cd',
            'border:1px solid #ffc107',
            'border-radius:8px',
            'padding:8px 12px',
            'margin:8px 0',
            'color:#856404',
            'font-weight:600'
        ].join(';');

        warning.textContent = `🚫 Ukryto ofertę firmy: ${company}`;
        return warning;
    }

    function updateStatus() {
        let status = document.getElementById('blacklist-script-status');

        if (!status) {
            status = document.createElement('div');
            status.id = 'blacklist-script-status';
            status.style.cssText = [
                'position:fixed',
                'right:12px',
                'bottom:12px',
                'z-index:2147483647',
                'background:#222',
                'color:#fff',
                'padding:8px 12px',
                'border-radius:6px',
                'font:13px/1.4 sans-serif',
                'box-shadow:0 2px 8px #0005'
            ].join(';');

            document.body.appendChild(status);
        }

        status.textContent =
            `Czarna lista: kart znalezionych: ${seenOffers.size}, ukrytych: ${hiddenOffers.size}`;
    }

    function processOffer(offer) {
        if (processedOffers.has(offer)) {
            return;
        }

        const companyNames = getCompanyNames(offer);

        // Jeśli karta jest dodana przed nazwą firmy, spróbujemy ponownie
        // po kolejnym dodaniu elementów do tej karty.
        if (companyNames.length === 0) {
            return;
        }

        processedOffers.add(offer);
        seenOffers.add(offer);

        const matchedName = blacklist.find(blockedName =>
            companyNames.some(companyName =>
                normalize(companyName).includes(normalize(blockedName))
            )
        );

        if (matchedName) {
            const companyName =
                companyNames.find(name =>
                    normalize(name).includes(normalize(matchedName))
                ) || matchedName;

            offer.parentNode.insertBefore(
                createWarning(companyName),
                offer
            );

            offer.style.setProperty('display', 'none', 'important');
            hiddenOffers.add(offer);
        }

        updateStatus();
    }

    function findOffersIn(node) {
        if (!(node instanceof Element)) {
            return;
        }

        if (node.matches(offerSelector)) {
            processOffer(node);
        }

        node.querySelectorAll(offerSelector).forEach(processOffer);
    }

    // Jednorazowe sprawdzenie ofert już obecnych na stronie.
    document.querySelectorAll(offerSelector).forEach(processOffer);

    // Obserwujemy wyłącznie dodawanie elementów, nie zmiany tekstu i atrybutów.
    let pendingNodes = new Set();
    let scheduled = false;

    const observer = new MutationObserver(mutations => {
        for (const mutation of mutations) {
            for (const node of mutation.addedNodes) {
                if (node instanceof Element) {
                    pendingNodes.add(node);
                }
            }
        }

        if (scheduled || pendingNodes.size === 0) {
            return;
        }

        scheduled = true;

        requestAnimationFrame(() => {
            scheduled = false;

            const nodesToProcess = pendingNodes;
            pendingNodes = new Set();

            nodesToProcess.forEach(findOffersIn);
        });
    });

    observer.observe(document.body, {
        childList: true,
        subtree: true
    });

    updateStatus();
})();